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nsUnicodeToGBK.h
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00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00010  * Software distributed under the License is distributed on an "AS IS" basis,
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00014  *
00015  * The Original Code is mozilla.org code.
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00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
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00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00046 #ifndef nsUnicodeToGBK_h___
00047 #define nsUnicodeToGBK_h___
00048 
00049 #include "nsUCSupport.h"
00050 #include "nsCOMPtr.h"
00051 #include "nsIUnicodeEncoder.h"
00052 #include "gbku.h"
00053 //----------------------------------------------------------------------
00054 // Class nsUnicodeToGBK [declaration]
00055 
00056 class nsUnicodeToGBK: public nsEncoderSupport
00057 {
00058 public:
00059 
00063   nsUnicodeToGBK(PRUint32 aMaxLengthFactor = 2);
00064   virtual ~nsUnicodeToGBK() {};
00065 
00066 protected:
00067 
00068   //--------------------------------------------------------------------
00069   // Subclassing of nsEncoderSupport class [declaration]
00070   NS_IMETHOD ConvertNoBuff(const PRUnichar * aSrc, 
00071                             PRInt32 * aSrcLength, 
00072                             char * aDest, 
00073                             PRInt32 * aDestLength);
00074 
00075   NS_IMETHOD ConvertNoBuffNoErr(const PRUnichar * aSrc, PRInt32 * aSrcLength, 
00076                                 char * aDest, PRInt32 * aDestLength)
00077   {
00078     return NS_OK;
00079   };  // just make it not abstract;
00080 
00081   NS_IMETHOD FillInfo(PRUint32 *aInfo);
00082 
00083   virtual void CreateExtensionEncoder();
00084   virtual void Create4BytesEncoder();
00085 
00086   nsCOMPtr<nsIUnicodeEncoder> mExtensionEncoder;
00087   nsCOMPtr<nsIUnicodeEncoder> m4BytesEncoder;
00088 protected:
00089   PRUnichar mSurrogateHigh;
00090   nsGBKConvUtil mUtil;
00091   PRBool TryExtensionEncoder(PRUnichar aChar, char* aDest, PRInt32* aOutLen);
00092   PRBool Try4BytesEncoder(PRUnichar aChar, char* aDest, PRInt32* aOutLen);
00093   virtual PRBool EncodeSurrogate(PRUnichar aSurrogateHigh, PRUnichar aSurrogateLow, char* aDest);
00094 };
00095 
00096 class nsUnicodeToGB18030: public nsUnicodeToGBK
00097 {
00098 public:
00099   nsUnicodeToGB18030() : nsUnicodeToGBK(4) {};
00100   virtual ~nsUnicodeToGB18030() {};
00101 protected:
00102   virtual void CreateExtensionEncoder();
00103   virtual void Create4BytesEncoder();
00104   virtual PRBool EncodeSurrogate(PRUnichar aSurrogateHigh, PRUnichar aSurrogateLow, char* aDest);
00105 };
00106 
00107 #ifdef MOZ_EXTRA_X11CONVERTERS
00108 class nsUnicodeToGB18030Font0: public nsUnicodeToGB18030
00109 {
00110 public:
00111   nsUnicodeToGB18030Font0() {};
00112   virtual ~nsUnicodeToGB18030Font0() {};
00113 protected:
00114   virtual void Create4BytesEncoder();
00115   NS_IMETHOD GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength, 
00116       PRInt32 * aDestLength);
00117   NS_IMETHOD FillInfo(PRUint32 *aInfo);
00118 };
00119 class nsUnicodeToGB18030Font1 : public nsTableEncoderSupport
00120 {
00121 public: 
00122   nsUnicodeToGB18030Font1();
00123   virtual ~nsUnicodeToGB18030Font1() {};
00124 protected: 
00125   NS_IMETHOD FillInfo(PRUint32 *aInfo);
00126 };
00127 #endif 
00128 
00129 #endif /* nsUnicodeToGBK_h___ */
00130